drm/amd/display: Fix update type for multiple planes

[Why]
determine_update_type_for_commit() uses pointers to single instance
of local variable to fill scaling/color info for all planes updates.
This is a bug, that leads to incorrect update type for commit in case
of multiple planes per crtc.
Each plane should refer to separate scaling/color data.

[How]
Use arrays for plane properties.
Bundle all properties into a single structure to simplify memory allocation.

Signed-off-by: Roman Li <roman.li@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 34 insertions, 30 deletions

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 3af014fcdcc1..2ac349849081 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -7759,24 +7759,27 @@ dm_determine_update_type_for_commit(struct amdgpu_display_manager *dm,
 	struct drm_crtc_state *new_crtc_state, *old_crtc_state;
 	struct dm_crtc_state *new_dm_crtc_state, *old_dm_crtc_state;
 	struct dc_stream_status *status = NULL;
-
-	struct dc_surface_update *updates;
 	enum surface_update_type update_type = UPDATE_TYPE_FAST;
+	struct surface_info_bundle {
+		struct dc_surface_update surface_updates[MAX_SURFACES];
+		struct dc_plane_info plane_infos[MAX_SURFACES];
+		struct dc_scaling_info scaling_infos[MAX_SURFACES];
+		struct dc_flip_addrs flip_addrs[MAX_SURFACES];
+		struct dc_stream_update stream_update;
+	} *bundle;
 
-	updates = kcalloc(MAX_SURFACES, sizeof(*updates), GFP_KERNEL);
+	bundle = kzalloc(sizeof(*bundle), GFP_KERNEL);
 
-	if (!updates) {
-		DRM_ERROR("Failed to allocate plane updates\n");
+	if (!bundle) {
+		DRM_ERROR("Failed to allocate update bundle\n");
 		/* Set type to FULL to avoid crashing in DC*/
 		update_type = UPDATE_TYPE_FULL;
 		goto cleanup;
 	}
 
 	for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
-		struct dc_scaling_info scaling_info;
-		struct dc_stream_update stream_update;
 
-		memset(&stream_update, 0, sizeof(stream_update));
+		memset(bundle, 0, sizeof(struct surface_info_bundle));
 
 		new_dm_crtc_state = to_dm_crtc_state(new_crtc_state);
 		old_dm_crtc_state = to_dm_crtc_state(old_crtc_state);
@@ -7793,8 +7796,9 @@ dm_determine_update_type_for_commit(struct amdgpu_display_manager *dm,
 		for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, j) {
 			const struct amdgpu_framebuffer *amdgpu_fb =
 				to_amdgpu_framebuffer(new_plane_state->fb);
-			struct dc_plane_info plane_info;
-			struct dc_flip_addrs flip_addr;
+			struct dc_plane_info *plane_info = &bundle->plane_infos[num_plane];
+			struct dc_flip_addrs *flip_addr = &bundle->flip_addrs[num_plane];
+			struct dc_scaling_info *scaling_info = &bundle->scaling_infos[num_plane];
 			uint64_t tiling_flags;
 
 			new_plane_crtc = new_plane_state->crtc;
@@ -7812,49 +7816,48 @@ dm_determine_update_type_for_commit(struct amdgpu_display_manager *dm,
 			if (crtc != new_plane_crtc)
 				continue;
 
-			updates[num_plane].surface = new_dm_plane_state->dc_state;
+			bundle->surface_updates[num_plane].surface =
+					new_dm_plane_state->dc_state;
 
 			if (new_crtc_state->mode_changed) {
-				stream_update.dst = new_dm_crtc_state->stream->dst;
-				stream_update.src = new_dm_crtc_state->stream->src;
+				bundle->stream_update.dst = new_dm_crtc_state->stream->dst;
+				bundle->stream_update.src = new_dm_crtc_state->stream->src;
 			}
 
 			if (new_crtc_state->color_mgmt_changed) {
-				updates[num_plane].gamma =
+				bundle->surface_updates[num_plane].gamma =
 						new_dm_plane_state->dc_state->gamma_correction;
-				updates[num_plane].in_transfer_func =
+				bundle->surface_updates[num_plane].in_transfer_func =
 						new_dm_plane_state->dc_state->in_transfer_func;
-				stream_update.gamut_remap =
+				bundle->stream_update.gamut_remap =
 						&new_dm_crtc_state->stream->gamut_remap_matrix;
-				stream_update.output_csc_transform =
+				bundle->stream_update.output_csc_transform =
 						&new_dm_crtc_state->stream->csc_color_matrix;
-				stream_update.out_transfer_func =
+				bundle->stream_update.out_transfer_func =
 						new_dm_crtc_state->stream->out_transfer_func;
 			}
 
 			ret = fill_dc_scaling_info(new_plane_state,
-						   &scaling_info);
+						   scaling_info);
 			if (ret)
 				goto cleanup;
 
-			updates[num_plane].scaling_info = &scaling_info;
+			bundle->surface_updates[num_plane].scaling_info = scaling_info;
 
 			if (amdgpu_fb) {
 				ret = get_fb_info(amdgpu_fb, &tiling_flags);
 				if (ret)
 					goto cleanup;
 
-				memset(&flip_addr, 0, sizeof(flip_addr));
-
 				ret = fill_dc_plane_info_and_addr(
 					dm->adev, new_plane_state, tiling_flags,
-					&plane_info,
-					&flip_addr.address);
+					plane_info,
+					&flip_addr->address);
 				if (ret)
 					goto cleanup;
 
-				updates[num_plane].plane_info = &plane_info;
-				updates[num_plane].flip_addr = &flip_addr;
+				bundle->surface_updates[num_plane].plane_info = plane_info;
+				bundle->surface_updates[num_plane].flip_addr = flip_addr;
 			}
 
 			num_plane++;
@@ -7875,14 +7878,15 @@ dm_determine_update_type_for_commit(struct amdgpu_display_manager *dm,
 
 		status = dc_stream_get_status_from_state(old_dm_state->context,
 							 new_dm_crtc_state->stream);
-		stream_update.stream = new_dm_crtc_state->stream;
+		bundle->stream_update.stream = new_dm_crtc_state->stream;
 		/*
 		 * TODO: DC modifies the surface during this call so we need
 		 * to lock here - find a way to do this without locking.
 		 */
 		mutex_lock(&dm->dc_lock);
-		update_type = dc_check_update_surfaces_for_stream(dc, updates, num_plane,
-								  &stream_update, status);
+		update_type = dc_check_update_surfaces_for_stream(
+				dc,	bundle->surface_updates, num_plane,
+				&bundle->stream_update, status);
 		mutex_unlock(&dm->dc_lock);
 
 		if (update_type > UPDATE_TYPE_MED) {
@@ -7892,7 +7896,7 @@ dm_determine_update_type_for_commit(struct amdgpu_display_manager *dm,
 	}
 
 cleanup:
-	kfree(updates);
+	kfree(bundle);
 
 	*out_type = update_type;
 	return ret;